Order

I am pulling files from a directory and echoing them. I scripted a petition, and for some reason, it changes the order that a person signs. The red part is where it echo's the names of the signers. Is there a way to have it display the signers in order they sign? (if you get the chance, check it out... http://nicotinejunkie.cv.vc/petition)

} else {
echo "<br><br><br><table border='0'><tr><td align='center'><font style='color: red;'>ERROR! Your signature has not been added!</font></td></tr><tr><td align='left'>Possible reasons of why your signature has not been added:<br> 1) The email submitted has already been used by another signer.<br> 2) A signer has already signed the petition under your IP Address.<br> 3) You have not agreed to the ";
echo "<a href='tos.php' style='border-width: 0px;' onclick=";
echo '"window.open(this.href, ';
echo "'popupwindow', 'width=356,height=427'); return false;";
echo '"';
echo ">Terms of Service</a>.<br>You have not filled out a section of the form.";
}
} else {